Don't mess with Kimmy K!

Kim Kardashian is the member of the K clan that's most pissed about Tristan Thompson and Jordyn Woods' cheating scandal, and she's doing her very best to support her sister during this difficult time.

"Kim is the one who is really upset about this. She’s livid. She’s so angry, and she’s 100 percent on Khloé’s side. She’s there for Khloé, letting her vent and talk about it. They’ve been in constant contact, and Kim is totally supportive. Guys may come and go, but the bond between the girls is never going away, and they’re committed to supporting each other," a source dished to People.

"Kim is putting the blame squarely where it belongs, on Tristan. She is telling Khloé to move on and to focus on being the best mother she can be to True. But Kim isn’t going to talk about this much publicly. This isn’t her battle to fight in the public eye. But behind the scenes, she’s definitely making her opinion known," the source added.

Kourtney feels similarly, and thinks the NBA star needs to be held accountable for his infidelity.

"Kourtney also says that it’s Tristan’s fault. He’s the one who made commitments to Khloé and he’s the one who broke his promises. What Jordyn did was bad, but she didn’t have the obligations and the promises that Tristan had," the insider revealed.

The worst part about all of it? They hate the athlete for humiliating their sibling so publicly not once but twice.

"Really at issue is the fact that Tristan publicly embarrassed Khloé, and if there’s anything the Kardashians won’t tolerate, it’s being embarrassed by someone else’s bad behavior. So the family is circling the wagons around Khloé and everyone is there for her. She’s texting and talking to them constantly, and all of them are 100 percent there for her," the source explained.

We think it's time for some good ol' fashioned revenge!